According to the music mogul's fellow 'Britain's Got Talent' judge Amanda Holden, the 53-year-old star - who is renowned for wearing his trousers above his waist - likes to go commando ''all the time'' because he doesn't have time to put any underwear on in the mornings.

She said: ''During the auditions we discovered that Simon doesn't wear pants. I can't reveal how we discovered this.

''Maybe because he has such a busy life he doesn't have time to put them on or take them off. Perhaps he should get someone to do that for him.''

Following Amanda's revelation about Simon's penchant for leaving his undercrackers in his draw at home, the 42-year-old blonde insisted she knows plenty more secrets about the 'X Factor' boss.

She added to the Mail on Sunday newspaper: ''I think I understand Simon. I know an awful lot about him. I know where the bodies are buried.''

The pair's fellow 'Britain's Got Talent' panellist David Walliams also insisted Simon only owns one pair of jeans.